Concentrator.



W. A. BUTGHART.

GNGENTRATOR- APPLIGATION FILED 513.13. 1911.

Patented Jly 4, 1911.

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W. A. BUTGHART.

CONCBNTRATOR.'

APPLIQATION FILED FEB.13, 1911.

Patented July 4, 1911.

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VJILLIAM A. BUTCHAR'I, 0F LGS NGELES, CAEDTFQRNIA. i

CONCENTHATJRY.

To all whom it may concern:

Be it known that i, Ji/ILLLM A. BU'ronAnT, a citizen of the United States, residing at Los Angeles, in the county ot Los Angeles and State otCalit'ornia, have invented a new and useful Concentrator, of which the following is a specification.

rhis invention relates to concentrator for separating mineral from the pulverized rock or sand in which it may be contained, and the main object of the invention is to accomplish such. separation in a more rapid, etcient and economical manner than has been heretofore done.

The invention relates to concentrators ot the class wherein a table having a plane sur- .tace is provided with rifiies extending longitudinaliy .of the table, such table being supported so as to present longitudinal and iaterai inclinations, and means being provided for teedingpulverized rock and its mineral contents and Water at the uppernside of the table., and .means also being provided. tor subjecting the table to longitudinai, re-

' cinrocatin'. differential motion whereb f the .i tm 7 vaines are caused' to gradually advance to the. discharve end the table and the lighter material is, Washed over the lower side of the table.

i'ifnjniportant object of the invention is to so construct the ritties in such a table as to ailow the Wash Water toact With maximum ciiiciency and rapidity in separating' the lighter niateriai from the concentrates.

another Object or" the invention is to so construct the ritiles on the table as to enable the concentrates to be carried away and discharged with minimum. loss.

Another-.object of the invention is to so v construct theriiiies on the table as to provide for successive stratifylng, cleaningT and discharggiiiig,P zones.

yt'ther-ohjects or" the invention will appear hereina iter.

"Ihc'accompanying drawings illustrate the invention, and referring thereto liigure L is a plan of the concentrating table embodying the invention. Fig. 2 is a side elevation, and Figs. 3 and t end elevations of one of the riiiles of such table. Fig; 5 is a proiiieof one oi" the riiiies, and Fig. *3 a contour thereof. Fig'. 7 is a transverse section on line azi-m7 in Fig. l. Fig. 8 is a side eie- -vation of the table. Fig. 9 is an end eleva tion thereof. Fig. 10 is a vertical section on line :rm-w10 Fig. 8, showing the construction Specification of Letters Patent.

applica-tion filed February 13, 19.1.1.

Serial litio. 608,455.

of the water boi.7 or inonder. iqig. 11 is a vertical section on line .rn-sem Fig. 87 showing' the construction of the 'feed box. Fig. i2 is a longitudinal section through the head motion.

1 designates the coment-rotor table or deck. Said table is provided with i'iiiles 2 extendinglongitudinaiiy thereon with a feed box 3 at the rear end and at the side which, in the operation of the machine, is the higher side of the tabie,l and with a water box e onmthe same side as the feed box and extending the remainder of the iength lci the table, for supplying wash Water to the higher ,side thereof.

Each of the riiiies consists ot tivo portions, a. portion ext.endiny troni the rear or feed end of the tabie for a certain. distance along its th, said portion tapering or beingf unito ly reduced in height as its advances; and a `oortion extending from the 'terminal tion. of nach tapered part to the end of the table. thi.: portion ot the riiiie being of practic y uniform height throughout its length. .iucti ri'iiies may be inade of any suitabie materiai, and the two portions described may he separately and joined in a suitable manner upon the table, or the whole riiile may be made in one continuous strip having the characteristic. features mentioned. Such rities may aiso be constructed-by cutting or otherwise removing from a suitable surface such portion thereof as Wili leave said ritiies projecting therefrom in the shape and form above described. Said riiiies, constructed in any of the manners mentioned, may vary from the erosssectional form shown in Figs. 3 and 4, as may be required by the peculiarities of the ore to be treated. Such rifiies are placed upon the concentrating table in such manner as to divide it into three distinct areas or zones. as follows:

(l) The rearward or tapering portions a of the riiiies are laid parailei to the line of motion of the table the height and length of such tapering` portions being increased regularly and progressively from the t'eed side toward the 'tailings discharge side of the table, said tapering portions ending on a diagonal line extending troni the higher toward the lower or tailings discharge side of the table. Although no two of these tapering1 portions are of the same height at their rear ends, they are all of substantially equai height at their termination along said .diagonal line, their height depending upon lido the class of material which the table is designed to handle. It may, however, be at times necessary to make such rililes of unequal height-s .at their forward termination as well as at their rear ends.

(2)- From the termination of the tapering portions a of such ritlles, another portion b of each riiile extends obliquely with reference to the line Aof motion, being deflected at" an angle thereto and toward the feed or wash water side of the table, for a distance and at an angle or upon a curve varying with the requirements of the ore to,

be treated. This portion of theitable constitutes the separating and cleaning zone and extends in a diagonal directionbetween the lines X X and y y, from the higher or,

feed side of the table toward its lower front corner.- This separating and cleaning zone may be varied as to shape and direction as required -either by the class of material being handled by the table orby'the form or type of table upon which this riiie system may be used. These deflected portions are so placed upon the table surface as to form channels which, about midway.Y of their `vlength, are of greater widt-hV than those formed by the riiles in the stratifying zone,

and thence converge in suchv manner as to form channels narrower than elsewhere of the length of such deflected riile portions. The initial and final ends. of each deflected riiile portion are somewhat .advanced or placed nearer the end of the table than those of the corresponding portion next higher on the table.

(3) From-the forward end of the deflected ril'lie section or cleaning zone justdescribed, thev riiles are deflected toward the lower side of the table, with relation to the'v direction of the preceding riftle portions and also preferably with relation tothe line of motion of the table, as' indicated at e, the degree of curve or angle of deection being determined by the requirements of the ore to be treated and other considerations.

vThese rifl'les are continiled toward the front other, so that the channels between lthe rifes are approximately horizontal.

Means are provided for 'supporting the table so that the front or concentrates discharge end is higher than'the rear .'or feed end thereof and so that the feed and wash water side of the table is higher than the tailings discharge side.

The table is mounted to have a longit-udinal reciprocating motion, said table being, for example, carried by longitudinal shaft sections 5 secured to a bracket 2O slidably mounted upon pedestals 6 on the base 7. Said base 7 is provided with transverse members 8 mounted on screws 9 engaging with the Hoor or support, indicated at l0,

or otherwise mounted in any suitable mannerso as to provide for adjustment or variation of the inclination of the table in a longitudinal direction. providedwith means for variation of its inclinatio'n in a transverse direction, the said shaft sections 5, for example, being adapted to turn as well as slide in their bearings and adjustable supporting means 11 being provided at one side of the table and connectingthe table with the transverse mem-` bers 8 of the base, said adjusting means consisting, for example, of screws mounted to turn in vertical standards 12 and adapted to be rotated by any suitable means such as a chain 13 engaging with sprocket wheels 14 y on said screws, said screws working in threaded sockets in heads 15 sliding on rods `25 connected to the table 1 on the bottom thereof; This sliding connection of the head 15 allows for reciprocating movement of the table. Such reciprocating movement may beeflected by any suitable head 'motion consisting, for example, of a toggle 1G engaging at one end with a fixed frame 17 on base 7 and at the other end with a rocker arm 18 having a rocking connection with a bar 19, said* bar extending through the 'bracket 20 on the table, said bar having a head '21 at one end for engaging said bracket, and a spring 22 being provided between said bracket and a collar 23 adjustably mounted on a sleeve 24 surroundingthe bar 19 and engaging the fixed member` 17; The toggle 16 is connected at its center 'pivot 28`by means of a pitman 26 to an eccentric Ior-crank 27, whereby a vertical vibratory motion is imparted to the toggle, and longitudinal reciprocating .motion is thereby imparted by rocker arm 18 to the bar 19 and to the table 1, said longitudinal Vmotion being differential, or with a differ'- -ence in velocity between its forward and back strokes, by reason of the combined effeet of the crank and toggle,- and of the action of the spring` 22. The construction is The table is alsoY preferably such that the forward stroke isV relatively slow and the back stroke is relatively rapid, so that the material on thetable tends to move with the table during the forward stroke, and the table tends to slip back from under the material in the'back stroke, resulting in a progressive creeping of the material toward the delivery end.

nnit'orm and y, gradu ated quantity.

1lilhile an water bos: the forms own 1n the drawings, the feed box 3 h fine* an inclined bottom 30 appreaching` t c side et the box, but leaving a slot 3l for the passage oit material and feed water onto the table near its upper edge. .It strip or moldingr 3:2 is secured on the top oi table l below the bottom of the feed box, this strip. acting as a distributor, and another strip 33 serving as a flash board is secured to the ends of the box and extends parallel and adjacent to the strip on the side toward the ieed slot 8l., forming an intermediate slot 3i through which the water is discharged over the distributer strip The wash water box et is provided also with an outside distributer strip 35 and an inside distributer strip 36, and a flash board 37 rev' suitable Jform of feed and wash s nia'v be used, l preter to use h I inovably seated on partitions 38 so that said,

dash board can be removed when necessary to enable the distributers to be cleared ot sand or obstructions. rhe wash water box is preferably divided into a plurality of seetions by partitions 38, and separate-water pipes 4G having valves Lil are provided for the respective sections or" the water box. The `water supply from said pipes runs over the inside distributer, under the flash board and over the outside distributer ot each section, and passes onto the top of the concentrating table at the upper side thereof in A t the lower side of the table, and extending from the corner thereof back a. certain variable distance, is a separator, consisting of a portion 43 of the ritlie at that i side of the table, reaching above the water level, placed for the purpose of making a positive division between tailings and middlings, the length of such separator being' varied'to suit? the requirements of the ore under treatment. i

ln that section oi the table covered by the ritlle portions d, there is a gradual uniform -rise in the bottoms of. channels between nels due to the transverse inclination of the table or its elevation at the wash water side` the effect of this longitudinal inclination being increased by that ot' the transverse inclination in proportion to the lateral deflection of the ritlies at this part of the table.

This is illustrated in Figs. 5 and G, Fig. G showing the horizontal contour or course oi riiie with relation to the line of motion indicated at ame, and Fig. 5 showing the protlle or effective elevation of the ritlle resulting from the llongitudinal elevation ot the table along` the line touw, with, relation to the .horizontal line -w, combined with the lateral tipping as indicated in dot-ted charging into said box, the motion of the table spreading it in a broad band or sheet, water being :ted continuously upon the table through the boxes or box sections el.. The sheet of material upon the table becomes progressively thinner as it crosses the stratit'ying Zone and approaches the end of the tapered portion of the rittles, the motion of the table and the presence of water causing the mineral contents to stratify or accumulate in the bottoms of the channels between the rililes by reason oi higher specific gravity. Upon reaching the edge otthe separating and cleaning zone7 r'. 6.? the point at which the ritlies commence to curve or deflect upward toward the wash water side of the table, as indicated by the line when, the mass encounters the descending flow of water from bones 4;, a portion of said How being parallel to the ritlies and in a direction the reverse of that in which the mass is moving, due to the height and curvature or deviation of the ritllcs at this point, as already described. The mineral contents follow the rii'le, being held thereby, while the sand, by reason oit' lower specific gravity, is continuously washed back, thereby becomingdeeper than the height of the rilllc, and passes over the successive riiies7 being finally discharged as tailings or waste. After passing the separating and cleaning zone the mineral enl deviation of the ritiles in the separating A Zone7 as compared with their direction in the stratifying zone, is to separate the riiiles and widen the spaces therebetween in which the material passes. The advance of the initial end of the deflected sec-v tion of each riftle, as compared with the corresponding end .of the preceding ritlle7 also has the ettect of increasing the width of the. channels between the detiected sections of the rities. That is to say, the channels in the separating zone are wider lthan the chain nels in the stratifying zone by reason of the deflection of the r-ifiles in the separating zone separating to the delivery zone, the riftles are brought closer together by` reason of their' deviation in the opposite dirgction,

and this is also of advantage in that as the forward movements of the minerall is accelerated in -this portion, less lateraits'pace. is required for its passage, and Vgreater effect 1s given to the superimposed flow of water moving in thesame direction. Moreover the' thoroughly cleaned concentrates are by reay son of this construction, gathered into a deep compact mass for protection against further action by the wash water.

What I claim is -4 1. A concentrator table having a plane.

surface provided with rifiles comprising' tapering rear portions parallel to the line of motion of the table, terminating upon a diagonal line and at equal height above the surface of the table, adjacent riflle portions.

' deflected obliquely toward the higher side of the table and' at an angle to the line of motion thereof, said deflected portions commencing upon the diagonal line formed by the ends of the tapering portions, and said deflected portions ending along'a line also diagonal to the longitudinal extension of the table, and being, through apart of their length, separated by wider channels than those4 between the portions of the riflles at the rear of the table, to cause the concentratesto'be spread for more effective cleaning by the wash water, and to provide adequate spa-ce for the retarded travel ofv concentrates along the upwardly inclined inter-v riflle channels, the initial and final ends of said deflected portion rof-each riflle being f 'nearer to the 'concentrates-discharge end of the table than the corresponding ends of the deflected riflle portion'. next higher on the table in combination withmeans for feed# ing material at the upper rear portion of the table and means for supplying wash i water at the upper portion of the table.

2. A concentrator table providedV with means for imparting longitudinal reciprocating motion thereto, means for supporting I the table to permit of such motion and providing for longitudinal and transverse inelination of thetal'plalieans for supply and distribution of material and wash water at the higher side of the table, rifiles on the table comprising rear portions parallel to the line of motion of the table, intermediate portions extending fromsaid rear portions and deflected obliquely toward the higher side of the table, and front portions extending from said intermediate portions and dcflected obliquely toward the opposite side of the table.

3. A reciprocating concentrator table of' plane surface provided with riflies comprising tapering' rear portions laid parallel to the line of motion of the table, adjacent portions deflected obliquely toward the higher side of the table andv at an angle to the line of motion thereof, said deflected portions commencingupon the diagonal line formed by the ends of the tapering portions, and said deflected portions endingr along a line also diagonal to the longitudinal extension of the table, and being,A

through a part of their length, separated by wider channels than those between the portions of the riflles at the rear of the table, said deflected portions converging at their forwardends in such manner as to be there separated by channels narrower than elselwhere in the length of such deflected portions for the purpose of gathering up the cleaned concentrates into a deep compact mass for protection against further. action by wash water, the initial and final ends of said deflected portion` of each riflle being nearer to the concentrates discharge end of the table than the correspondingendsof the deflected portion of the rifile next higher on Vthey table in combination with means for .feeding material at the upper. rear portion of the table, and means forsupplying wash, water at the upper side of the table.

4. A concentrator. table having a plane .surface and provided'with riflles on said surface, a portion of said riffles near the rear end ofthe table extending longitudinally of the table to form with their intervening channels a stratifying zone, another portion of the riflles extending from the ends of the preceding rifiie' portions and 'deflected toward the upper side of the table to form With their intervening channels a separating and cleaning zone, and a third rifllc portion extending from the ijiflle portions in the separating and cleaning zone and deflected therefrom toward the lower side of the table to form with their intervening channels a discharging zone.

5. A' concentrator table having a plane surface and provided with rifilcs thereon, means for supporting the table in position such that its surface inclines downwardly toward the tailings side and upwardly'to- Ward the concentrates discharge end. means ing water to the upper side ofthe table, said riilles having portions extending from the feed end ofthe table toward the discharge end and adapted to operate inconnection with the Water passing transversely vgrerthe table tostratify and clean' the Ina-V terial fed ontoithe table, and terminal riiiies extending from the discharge ends of the aforesaid riie portions obliqnelyv toward the lower side of the table upon lines in. which the longitudinal and transverse inclinations compensate each other so that the channels between the riiiies are approximatelylevel,

so as to retainwater upon the table surface' and whereby the concentrates are conducted with the aid of suchl retained water, 4to the discharge. end of the table.

6. A concentrator comprising a longitudinally differentially reciprocable, transversely and longitudinally inclined table,"means for supplying pulp and wash-water at the higher side, riffles upon the table and extending the length thereof, portions of said .riilesfat a Vfor supplying Wash water along the upper side of the table, said table being provided with' riiiles coinprisingtapering rear por.-

'tions laid parallel to the line of motion of the table, adjacent portions deflected obliquelytoward the higher vside of the table and at an angle to the line of motion thereof, said deflected portions commencing upon the diagonal line formed by the forward ends of the tapering portions, and said deflected portions ending alonga line also diagonal to the longitudi- .nal extension of the table, and being, through y,a part Aof theii` length, separated by wider channels than-.those between the'. portions of the riiies at the rear of the table, said deflected portions converging at their forward ends in such manner as to be there separated by channels narrower-than elsewhere inthe length of such deflected p0rtions, the initial and final ends of said deflected portions of each riflie being nearer to' .the concentrates discharge end of the table than the corresponding ends of the deflected portion of the rilile next higher on the table, and terminal riilies commencing upon the diagonal line formed by the forward ends of eov saidupwardly deflected portions, extendingx thence obliquely toward the lower side of "the table upon straight lines in'which the longitudinal and transverse inclinations com' pensate eachother, so that the channels between the ritlies are'approximately level.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this L1th day of February 1911.

WILLIAM A. BUTCHAFT.

#In presence of- ARTHUR P. KNIGHT,

FRANK L. A. GRAHAM.

Copies of this patent may he obtained for five cents. each, byaddressiuigr `the Commissioner of atents,

Washington, D, C. 

